英语是世界上使用最广泛的语言。以下是精品学习网为大家整理的高二年级英语必修五Unit3同步练习题，希望可以解决您所遇到的相关问题，加油，精品学习网一直陪伴您。

Ⅰ.单词拼写

1.He was ________(证实)as captain for the rest of the season.

2.Could you do me a ________(帮助)and pick up Sam from school today?

3.The investors were ________(使惊吓)off by the company's low profits that year.

4.I can't believe that enormous meal wasn't enough to satisfy your ________(饥饿).

5.At the end of the news，they often give you a ______(总结;概要)of ten main news stories.

6.Canada and Britain have established diplomatic ____(关系)with North Korea.

7.I think he ________(实施)himself admirably，considering the difficult circumstances.

8.Ships must follow the ________(航道)into the port.

9.________(插入)our fingers between the layers and press them apart.

10.The government feared the strike might produce a ________(连锁)reaction in other industries.

Ⅱ.单项填空

1.Bill insisted________a meeting on what to do for the Japan Earthquake.

A.having held　　　　　 B.to hold

C.on holding  D.hold

2.The film was so ________ that I was ________ when I saw it.

A.frightened，frightening

B.frightening，frightened

C.frightened，frightened

D.frightening，frightening

3.________ summary，the two universities have a lot ________ common.

A.On;on  B.On;in

C.In;on  D.In;in

4.—How about your school?

—Oh，very good.You can't find ________ one in this city.

A.the better  B.the best

C.a better  D.better

5.You can profit ________ my mistakes and avoid them yourself.

A.by  B.with

C.on  D.in

6.(2013•株州高二检测)Exam­takers“virtue”will be taken into ________ in the 2013 nationwide public servants' exam.

A.focus  B.target

C.consideration  D.contribution

7.(2012•扬州高二检测)You didn't let me drive.If we________in turn，you________so tired.

A.drove;didn't get

B.drove;wouldn't get

C.were driving;wouldn't get

D.had driven;wouldn't have got

8.I have been convinced that the print media are usually more ________ and more reliable than television.

A.accurate  B.ridiculous

C.urgent  D.shallow

9.________the technical worker has limited knowledge，he has a lot of experience.

A.Unless  B.While

C.As  D.Since

10.Not until he left his home ________ to know how important the family was for him.

A.did he begin  B.had be begun

C.he began  D.he had begun

Ⅲ.阅读理解

Genetically modified(GM)(转基因的)crops have made an enormous positive influence on the world.  In recent years，GM technology has brought much benefit directly to farms,  reducing the  use of poisonous  chemicals that  kill  pests  of  plants，and  reducing  greenhouse gas emissions(排放).

A particular concern among farmers in developing countries is the loss of crops to insect pests.One way to fight this problem is to use chemicals，but this behavior will do harm to the health of farmers，the environment，and the people who eat the food.Instead，biotechnology can be used to increase production of pest­resistant crops.For example，in Africa，the sweet potato serves as an important crop，but viruses(病毒)can dramatically destroy its output by up to 80%.The Kenya Agricultural Research Institute，however，has developed a genetically modified sweet potato that can increase crop production by 18-25%.What's more，this new kind of potato has genes that resist damage due to bad climate or unexpected natural disasters.

The use of genetically modified foods can have a positive effect on the economy，especially in less developed countries.GM crops have already led to economic growth in South Africa，according to some studies.Because GM crops require fewer chemicals，farmers can save money on both the costs of pesticides and labor necessary to manage the treatments.This，combined with higher output，allow the farmer to gain more from the product.